[llvm-branch-commits] [llvm] [X86] Add atomic vector tests for >1 sizes. (PR #120387)

[James Y Knight via llvm-branch-commits]

jyknight wrote:

> Atomic vectors with size >1 are lowered to calls.

That's not true; they're only lowered to calls when the alignment is not known to be sufficient (e.g. `<2 x i32>` must have `align 8`, not `align 4`).

https://github.com/llvm/llvm-project/pull/120387